Grades 5-8. Aside from a quick recap of historical conflicts in Afghanistan, Walker steers clear of specifics and presents general overviews of world problems and the methods for resolving global and civil strife. Neither picture is a neat one—innumerable combinations of social, economic, and political factors spark and fuel wars, and (particularly in the modern era) peace is less a quantifiable state than a fragile, incremental process. Yet even unreflective readers will come away understanding, as one of the sidebar quotes (attributed here to Spinoza) puts it, that “no matter how thin you slice it, there will always be two sides.” Aside from occasional maps or charts there are no illustrations, but frequent sidebars and insertions in different sizes or weights of type enhance readability. Walker only occasionally links her analysis to readers’ conflicts and lays out no itemized blueprints or activities for waging peace. Still, she does make a strong case for the importance of open communication, and that’s a good start.